Yankho lalifupi ndi inde. Asidi ya cyaniric idzachepetsa pH ya madzi a dziwe.
Sianuric acid ndi asidi weniweni ndipo pH ya 0.1% cyanuric acid solution ndi 4.5. Sikuwoneka kuti ndi acidic kwambiri pomwe pH ya 0.1% sodium bisulfate solution ndi 2.2 ndipo pH ya 0.1% hydrochloric acid ndi 1.6. Koma chonde dziwani kuti pH ya maiwe osambira ili pakati pa 7.2 ndi 7.8 ndipo pKa yoyamba ya cyanuric acid ndi 6.88. Izi zikutanthauza kuti mamolekyu ambiri a cyanuric acid mu dziwe losambira amatha kumasula ayoni wa haidrojeni ndipo kuthekera kwa asidi cyanuric kuchepetsa pH kuli pafupi kwambiri ndi sodium bisulfate yomwe nthawi zambiri imagwiritsidwa ntchito ngati pH reducer.
Mwachitsanzo:
Pali dziwe losambira lakunja. pH yoyambirira yamadzi am'dziwe ndi 7.50, alkalinity yonse ndi 120 ppm pomwe mulingo wa cyanuric acid ndi 10 ppm. Chilichonse chikuyenda bwino, kupatulapo zero cyanuric acid. Tiyeni tiwonjezere 20 ppm wa cyaniric acid youma. Sianuric acid amasungunuka pang'onopang'ono, nthawi zambiri amatenga masiku awiri kapena atatu. Asidi wa cyanuric akasungunuka kwathunthu pH ya madzi a dziwe idzakhala 7.12 yomwe imakhala yotsika kuposa malire otsika ovomerezeka a pH (7.20). 12 ppm ya sodium carbonate kapena 5 ppm ya sodium hydroxide ndiyofunika kuwonjezera kusintha pH vuto.
Monosodium cyanrate madzi kapena slurry amapezeka m'masitolo ena osambira. 1 ppm monosodium cyanurate idzaonjezera mlingo wa cyanuric acid ndi 0.85 ppm. Monosodium cyanurate imasungunuka mwachangu m'madzi, chifukwa chake ndiyosavuta kugwiritsa ntchito ndipo imatha kuchulukitsa msanga acidic acid mu dziwe losambira. Mosiyana ndi cyanuric acid, monosodium cyanrate madzi ndi zamchere ( pH ya 35% slurry ili pakati pa 8.0 mpaka 8.5) ndipo imawonjezera pang'ono pH ya madzi a dziwe. Mu dziwe lomwe latchulidwa pamwambapa, pH ya madzi a dziwe ikwera kufika pa 7.68 mutawonjezera 23.5 ppm ya pure monosodium cyanrate.
Musaiwale kuti cyanuric acid ndi monosodium cyanrate m'madzi am'madzi amakhalanso ngati ma buffers. Ndiko kuti, kuchuluka kwa asidi wa cyanuric kumapangitsa kuti pH isasunthike. Chifukwa chake chonde kumbukirani kuyesanso kuchuluka kwa alkalinity pamene pH ya madzi a dziwe ikufunika kuti musinthe.
Komanso dziwani kuti asidi cyanuric ndi chotchinga champhamvu kuposa sodium carbonate, kotero kusintha pH kumafuna kuwonjezera asidi kapena zamchere kuposa wopanda cyanuric acid.
Padziwe losambira lomwe pH yoyambirira ndi 7.2 ndipo pH yofunidwa ndi 7.5, alkalinity yonse ndi 120 ppm pomwe mulingo wa asidi wa cyanuric ndi 0, 7 ppm wa sodium carbonate ukufunika kuti ukwaniritse pH yomwe mukufuna. Sungani pH yoyambirira, pH yofunidwa ndi alkalinity yonse ndi 120 ppm osasinthika koma sinthani asidi wa cyanuric kukhala 50 ppm, 10 ppm ya sodium carbonate ikufunika tsopano.
Pamene pH ikufunika kutsitsidwa, cyaniric acid imakhala ndi mphamvu zochepa. Pa dziwe losambira lomwe pH yoyambirira ndi 7.8 ndipo pH yofunidwa ndi 7.5, alkalinity yonse ndi 120 ppm ndipo mulingo wa asidi wa cyanuric ndi 0, 6.8 ppm wa sodium bisulfate ndiyofunika kuti mukwaniritse pH yomwe mukufuna. Sungani pH yoyambirira, pH yofunidwa ndi alkalinity yonse ndi 120 ppm yosasinthika koma sinthani asidi wa cyanuric kukhala 50 ppm, 7.2 ppm ya sodium bisulfate ikufunika - 6% yokha yowonjezera ya mlingo wa sodium bisulfate.
Sianuric acid ilinso ndi mwayi woti sichipanga sikelo ndi calcium kapena zitsulo zina.
Nthawi yotumiza: Jul-19-2024